CN102268821A - Method for manufacturing artificial leather by utilizing two-component liquid polyurethane - Google Patents
Method for manufacturing artificial leather by utilizing two-component liquid polyurethane Download PDFInfo
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- CN102268821A CN102268821A CN2011101698430A CN201110169843A CN102268821A CN 102268821 A CN102268821 A CN 102268821A CN 2011101698430 A CN2011101698430 A CN 2011101698430A CN 201110169843 A CN201110169843 A CN 201110169843A CN 102268821 A CN102268821 A CN 102268821A
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Abstract
The invention relates to the technical field of artificial leather manufacturing methods, and in particular relates to a method for manufacturing artificial leather by utilizing two-component liquid polyurethane. The method is characterized by coating the two-component liquid polyurethane on leather covering to which release paper is adhered, simultaneously covering a base fabric on the coating and manufacturing the polyurethane artificial leather with more micropores in the leather layer through heating foaming. By utilizing the technology, the production links are reduced, the capacity is improved, the energy consumption and environmental pollution are substantially reduced and the high-quality polyurethane artificial leather is successfully manufactured. The method has the following beneficial effects: (1) the two-component liquid polyurethane is used instead of the traditional solvent-based polyurethane pulp; and therefore the link of wastewater distillation and recovery is avoided, thus achieving the aims of energy conservation and emission reduction, and meanwhile, the production environment is not polluted; and (2) once molding is used instead of the process for producing the base and the surface layer respectively, thus achieving the aim of improving the production benefits and simultaneously reducing the energy consumption.
Description
Technical field
The present invention relates to artificial leather manufacture method technical field, relate in particular to a kind of method of utilizing two component liquid polyurethane manufacturer fabricate-leather.
Background technology
The natural leather developing history is long, but because expansion, the increasing of environmental protection dynamics and the continuous increase of social demand of population, it is not enough that limited natural leather resource seems day by day.Arise at the historic moment near the polyurethane artificial leather of natural leather in outward appearance, function, aspect perceptual, formed firm market.The polyurethane cortex of wet polyurethane artificial leather contains more space, thereby makes this kind artificial leather have good saturating wet, permeability, and is soft, plentiful, slim and graceful, more is imbued with the style of natural leather.
At present, the mode of production of wet polyurethane artificial leather is to adopt the water freezing method, being about to the polyurethane resin pellet is dissolved in dimethyl formamide (DMF) solvent, then its blade coating is formed wet coating on base cloth, immersion has affinity interaction with DMF and does not have in the affine tank with polyurethane again, and the water in the tank has been replaced the DMF in the coating, and its coating is solidified, oven dry after pressure roller is extruded water, embryo at the bottom of the many empty cortexes of formation.End embryo through the processing of dry method veneer, forms the appearance effect that exactly likes natural leather surface pattern or other styles again.
Because this technology must be through the water replacement solvent, produce a large amount of waste water (water+DMF) in process of production.In order to save solvent, reduce discharge of wastewater, through distillating recovering solvent, ammonia gas discharging of meeting generation diformazan and recovery residue are bigger to atmosphere pollution in removal process with waste water, and fire coal and electric energy that distillation need be a large amount of cause energy resource consumption.Fabric coating needs oven dry also to need a large amount of energy after water is wet.The DMF gas that is volatilized in slurry and the wet layer has certain pollution to be unfavorable for workers'health to production environment in process of production.
And end embryo and surperficial cortex are produced on wet production line and dry process production line respectively, and complex process is loaded down with trivial details, and production capacity is low, energy consumption is high.
Summary of the invention
The present invention is for overcoming the deficiencies in the prior art part, purpose is to provide a kind of method of utilizing two component liquid polyurethane manufacturer fabricate-leather, this method is with a kind of pair of component liquid polyurethane, be coated in on the surface of release liners, cover one deck base cloth simultaneously, in the middle of the foaming of heating makes cortex, contain the polyurethane artificial leather of more micropore.Utilize this technology to reduce production link and improve production capacity, significantly reduce energy resource consumption and environmental pollution, and successfully make the high-quality polyurethane artificial leather, solve problems of the prior art.
The present invention seeks to be to reduce the energy resource consumption in the artificial leather production process, enhance productivity, and the pollution that improves production environment, a kind of method of utilizing two component liquid polyurethane manufacturer fabricate-leather adopted.
In view of the above-mentioned state of the art, the inventor, is coated on the surface with release liners a kind of pair of component liquid polyurethane through a large amount of tests, covers one deck base cloth simultaneously, contains the polyurethane artificial leather of more micropore in the middle of the foaming of heating makes cortex.Utilize this technology to reduce production link and improve production capacity, significantly reduce energy resource consumption and environmental pollution, and successfully make the high-quality polyurethane artificial leather.
The present invention achieves the above object by the following technical programs: 1, a kind of method of utilizing two component liquid polyurethane manufacturer fabricate-leather may further comprise the steps: 1) solvent borne polyurethane or aqueous polyurethane slurry are added organic solvent through fully stirring into slurry; 2) slurry evenly is coated on the release liners, forms surface layer epithelium through oven for drying with certain decorative pattern; 3) with A, B component, A in proportion: the B=100 of two component liquid polyurethanes: (33.33～200) after evenly mixing on the high-speed mixer, with the even blade coating of coating machine on surface layer; 4) on coating, cover one deck base cloth again; 5) coating is heated through 20～200 ℃ of baking ovens make its foamable gel, form epithelium bottom, connected surface layer and base cloth simultaneously with dense space; 6) artificial leather of drying forming is peeled off from release liners.
As preferably, described solvent borne polyurethane of step 1) or aqueous polyurethane slurry, its solid content are 30-80%.
As preferably, the described slurry viscosity of step 1) is 200～5000CP.
As preferably, step 2) the described slurry coating thickness that evenly is coated on the release liners is 0.01mm～10mm.
As preferably, step 2) described oven temperature is 50～200 ℃.
As preferably, step 3) is described to be 0.01～10mm with the coating layer thickness of the even blade coating of coating machine on surface layer.
Beneficial effect of the present invention: (1) has replaced traditional solvent borne polyurethane slurry with two component liquid polyurethanes, has avoided the waste water distillation to reclaim link, thereby has reached the purpose of energy-saving and emission-reduction, also makes production environment not contaminated simultaneously.(2) technology that has replaced end embryo surface layer to produce respectively with one-shot forming, thus reached the purpose that improves productivity effect, also reduced energy consumption simultaneously.
The specific embodiment
The present invention is described further below in conjunction with specific embodiment, but protection scope of the present invention is not limited in this:
Embodiment 1: utilize the process of two component liquid polyurethane manufacturer fabricate-leather as follows:
1. with the solvent borne polyurethane slurry, blade coating one layer thickness is the coating of 0.2mm on release liners, dries through 120 ℃ temperature again;
Described slurry formula for raw stock is as follows:
Solvent borne polyurethane: 100
Butanone (MEK): 30
Dimethyl formamide (DMF): 50
Colorant: 0.6
2. with A, the B component of two component liquid polyurethanes, A/B=50/100 is after evenly mixing on the high-speed mixer in proportion, and on surface layer, coating layer thickness is 0.3mm with the even blade coating of coating machine, covers one deck base cloth again on coating;
3. coating is heated through 50 ℃ of baking ovens and make its foamable gel, form epithelium bottom, connected surface layer and base cloth simultaneously with dense space.
4. the artificial leather of drying forming is peeled off and batched from release liners, on request the test package warehouse-in.
Embodiment 2:
Utilize the process of two component liquid polyurethane manufacturer fabricate-leather as follows:
1. with the solvent borne polyurethane slurry, blade coating one layer thickness is the coating of 0.5mm on release liners, dries through 150 ℃ temperature again;
Described slurry formula for raw stock is as follows:
Solvent borne polyurethane: 100
Butanone (MEK): 20
Dimethyl formamide (DMF): 60
Colorant: 1.2
2. with A, the B component of two component liquid polyurethanes, A/B=100/300 is after evenly mixing on the high-speed mixer in proportion, and on surface layer, coating layer thickness is 0.5mm with the even blade coating of coating machine, covers one deck base cloth again on coating;
3. coating is heated through 150 ℃ of baking ovens and make its foamable gel, form epithelium bottom, connected surface layer and base cloth simultaneously with dense space.
4. the artificial leather of drying forming is peeled off and batched from release liners, on request the test package warehouse-in.
For effect more energy-conservation, efficient, environmental protection, we have done data statistics in process of production, and the testing result comparison sheet is as follows:
From above record as can be seen: adopt two ingredient liquids polyurethane production artificial leather technology, effectively controlled energy resource consumption, reduce noxious gas emission, improved production efficiency.
Above described be specific embodiments of the invention and the know-why used, if the change of doing according to conception of the present invention, when the function that it produced does not exceed spiritual that specification and accompanying drawing contain yet, must belong to protection scope of the present invention.
Claims (6)
1. method of utilizing two component liquid polyurethane manufacturer fabricate-leather is characterized in that may further comprise the steps:
1) solvent borne polyurethane or aqueous polyurethane slurry are added organic solvent through fully stirring into slurry;
2) slurry evenly is coated on the release liners, forms surface layer epithelium through oven for drying with certain decorative pattern;
3) with A, B component, A in proportion: the B=100 of two component liquid polyurethanes: (33.33～200) after evenly mixing on the high-speed mixer, with the even blade coating of coating machine on surface layer;
4) on coating, cover one deck base cloth again;
5) coating is heated through 20～200 ℃ of baking ovens make its foamable gel, form epithelium bottom, connected surface layer and base cloth simultaneously with dense space;
6) artificial leather of drying forming is peeled off from release liners.
2. a kind of method of utilizing two component liquid polyurethane manufacturer fabricate-leather according to claim 1 is characterized in that described solvent borne polyurethane of step 1) or aqueous polyurethane slurry, and its solid content is 30～80%.
3. a kind of method of utilizing two component liquid polyurethane manufacturer fabricate-leather according to claim 2 is characterized in that the described slurry viscosity of step 1) is 200～5000CP.
4. a kind of method of utilizing two component liquid polyurethane manufacturer fabricate-leather according to claim 1 is characterized in that step 2) the described slurry coating thickness that evenly is coated on the release liners is 0.01mm～10mm.
5. a kind of method of utilizing two component liquid polyurethane manufacturer fabricate-leather according to claim 4 is characterized in that step 2) described oven temperature is 50～200 ℃.
6. a kind of method of utilizing two component liquid polyurethane manufacturer fabricate-leather according to claim 4, it is characterized in that step 3) described be 0.01～10mm with the coating layer thickness of the even blade coating of coating machine on surface layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2011101698430A CN102268821A (en) | 2011-06-21 | 2011-06-21 | Method for manufacturing artificial leather by utilizing two-component liquid polyurethane |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011101698430A CN102268821A (en) | 2011-06-21 | 2011-06-21 | Method for manufacturing artificial leather by utilizing two-component liquid polyurethane |
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| CN102268821A true CN102268821A (en) | 2011-12-07 |
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Cited By (3)
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|---|---|---|---|---|
| CN102582304A (en) * | 2012-03-01 | 2012-07-18 | 杭州鹰自达塑业有限公司 | Method for forming foaming product on release paper by adopting printing technology |
| CN105992847A (en) * | 2015-05-28 | 2016-10-05 | 鹤山市新科达企业有限公司 | Production method of solvent-free foamed polyurethane synthetic leather |
| CN111926578A (en) * | 2020-07-31 | 2020-11-13 | 安安(中国)有限公司 | Four-side elastic synthetic leather and production method thereof |
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|---|---|---|---|---|
| CN102582304A (en) * | 2012-03-01 | 2012-07-18 | 杭州鹰自达塑业有限公司 | Method for forming foaming product on release paper by adopting printing technology |
| CN105992847A (en) * | 2015-05-28 | 2016-10-05 | 鹤山市新科达企业有限公司 | Production method of solvent-free foamed polyurethane synthetic leather |
| WO2016187857A1 (en) * | 2015-05-28 | 2016-12-01 | 鹤山市新科达企业有限公司 | Production method of solvent-free foamed polyurethane synthetic leather |
| CN111926578A (en) * | 2020-07-31 | 2020-11-13 | 安安(中国)有限公司 | Four-side elastic synthetic leather and production method thereof |
| CN111926578B (en) * | 2020-07-31 | 2023-02-14 | 安安(中国)有限公司 | Synthetic leather made of four-way stretch material and production method thereof |
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Application publication date: 20111207 |